Walton-on-Thames, known locally as Walton, is a market town on the south bank of the Thames in northwest Surrey, England. It is in the Borough of Elmbridge, about 15 mi (24 km) southwest of central London. Walton forms part of the Greater London built-up area, within the KT postcode and is served by a wide range of transport links. According to the 2011 Census, the town has a total population of 22,834. The town itself consists mostly of suburban streets, with a historic town centre of Celtic origin. It is one of the largest towns in the Elmbridge borough, alongside Weybridge.

Surrey is a ceremonial county in South East England and one of the home counties. It is bordered by Greater London to the northeast, Kent to the east, East and West Sussex to the south, and Hampshire and Berkshire to the west. The largest settlement is Woking.